US5493946A - Pneumatic booster with solenoid auxiliary control, particularly for motor vehicle brake systems - Google Patents

Pneumatic booster with solenoid auxiliary control, particularly for motor vehicle brake systems Download PDF

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Publication number
US5493946A
US5493946A US08/383,372 US38337295A US5493946A US 5493946 A US5493946 A US 5493946A US 38337295 A US38337295 A US 38337295A US 5493946 A US5493946 A US 5493946A
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US
United States
Prior art keywords
piston
valve
valve barrel
seal
booster
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US08/383,372
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English (en)
Inventor
Peter Schluter
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ZF International UK Ltd
Original Assignee
Lucas Industries Ltd
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Filing date
Publication date
Application filed by Lucas Industries Ltd filed Critical Lucas Industries Ltd
Assigned to LUCAS INDUSTRIES PUBLIC LIMITED COMPANY reassignment LUCAS INDUSTRIES PUBLIC LIMITED COMPANY ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SCHLUTER, PETER
Application granted granted Critical
Publication of US5493946A publication Critical patent/US5493946A/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
    • B60T13/24—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being gaseous
    • B60T13/46—Vacuum systems
    • B60T13/52—Vacuum systems indirect, i.e. vacuum booster units
    • B60T13/563—Vacuum systems indirect, i.e. vacuum booster units with multiple booster units, e.g. tandem booster units
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T11/00—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant
    • B60T11/10—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant transmitting by fluid means, e.g. hydraulic
    • B60T11/16—Master control, e.g. master cylinders
    • B60T11/236—Piston sealing arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
    • B60T13/24—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being gaseous
    • B60T13/46—Vacuum systems
    • B60T13/52—Vacuum systems indirect, i.e. vacuum booster units
    • B60T13/57—Vacuum systems indirect, i.e. vacuum booster units characterised by constructional features of control valves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
    • B60T13/66—Electrical control in fluid-pressure brake systems
    • B60T13/72—Electrical control in fluid-pressure brake systems in vacuum systems or vacuum booster units
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
    • B60T8/321—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration deceleration
    • B60T8/3255—Systems in which the braking action is dependent on brake pedal data
    • B60T8/3275—Systems with a braking assistant function, i.e. automatic full braking initiation in dependence of brake pedal velocity
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2400/00—Special features of vehicle units
    • B60Y2400/81—Braking systems

Definitions

  • the present invention relates to a pneumatic booster with solenoid auxiliary control, particularly for motor vehicle brake systems according to the preamable of claim 1.
  • the stopper element is secured to the piston and extends outwardly through radial recesses of the valve barrel and valve body in alignment with each other where it coacts with a stopper formed on the booster housing.
  • the recess of the valve barrel is dimensioned so that its resting position is dictated by the valve barrel being in direct contact with the stopper element.
  • the seal interposed between valve barrel and piston is a lip-type seal held in an annular groove of the piston and, irrespective of the position of the valve barrel with respect to the piston, is in sealing contact with a cylindrical inner wall of the valve barrel.
  • solenoid actuation of the valve barrel as well as its subsequent return to its rest position are obstructed.
  • Reliable return of the valve barrel to its rest position following exclusively solenoid actuation, i.e. with the piston halted in its rest position necessitates powerful dimensioning of the return spring which, in turn, together with the aforementioned friction forces makes solenoid actuation of the valve barrel difficult.
  • the solenoid also needs to be dimensioned powerfully which adds to its space requirement--already substantial in the cramped space availability within the booster --still further, and also results in heat dissipation problems due to the added current consumption of the solenoid.
  • the piston is configured with a coupling element which in the rest position of the piston is axially spaced away from an abutment assigned to it and is formed on the valve barrel.
  • the piston In mechanical actuation of the brake booster the piston must thus be shifted forwards by a certain distance before its coupling element comes up against the abutment of the valve barrel and reliably coupling it into the movement. It may, however, also happen that the valve barrel is coupled into the movement right from the start by friction transmitted from the piston via the seal to the valve barrel. Although this has no damaging effect, here too, the friction has the drawback already described.
  • the invention is thus based on the object of maintaining the solenoid forces required in a pneumatic booster with solenoid auxiliary control as low as possible.
  • the invention is based on the realization that a seal between piston and valve barrel is only necessary as long as both are in their rest position, this being the reason why it is sufficient to provide only an axially effective seal between piston and valve barrel; it being acceptable that this seal instantly loses its effect when the valve barrel leaves its rest position due to solenoid actuation, whilst the piston remains in its rest position.
  • FIG. 1 is an axial section through a pneumatic brake booster with solenoid auxiliary
  • FIG. 2 is an enlarged partial view of FIG. 1.
  • FIG. 3 is yet a further enlarged partial view of FIG. 2 and
  • FIG. 4 a partial view of a deviation embodiment of the invention corresponding to FIG. 3.
  • the brake booster illustrated in FIGS. 1 to 3 is substantially rotationally syymetrical with reference to an axis A which normally agrees with the longitudinal direction of the vehicle when installed in a motor vehicle.
  • the brake booster is of tandem design having a booster housing 10, a first chamber 12 and a second chamber 14, which are separated from each other by a movable wall 16, as well as a first additional chamber 12' and a second additional chamber 14', which are separated from each other by a movable wall 16'.
  • the booster housing 10 is held together by a parallel-axis arrangement of tension rods, of which only one is illustrated.
  • a control valve 20 which is incorporated in the main in the booster housing 10 and has with reference thereto an axially movable valve body 22.
  • an annular first valve seat 24 is formed which separates a passage 26 merging into the rear chamber 12 from a passage 28 merging into the front chamber 14.
  • the valve body 22 has further an axial bore in which a central sleeve 29 is disposed secured to the valve body 22.
  • a sleeve-shaped valve barrel 30 is slidingly guided along the axis A.
  • the valve barrel 30 is composed of front and rear components which are bolted together as shown in FIG. 1.
  • a second valve seat 32 is formed concentric to the first valve seat 24.
  • valve barrel 30 Spaced upstream from the second valve seat 32 (shown on the left in the drawing) the valve barrel 30 has a radial recess 34 which joins another radial recess 36 configured wider, however, in the axial direction in the valve body 22.
  • the valve barrel 30 is permanently urged to the rear (to the right in FIGS. 1 to 3) by an axially preloaded valve spring 38.
  • a solenoid 40 is incorporated which is assigned to the left-hand component of the valve barrel 30 as the solenoid armature such that the valve barrel 30 is drawn forwards against the resistance of the valve spring 38 when the solenoid 40 is energized.
  • a piston rod 41 of a piston 42 is guided which at its rear end is connected to a rod-shaped actuating element 44 and having at its front end a piston head 46.
  • the latter forms together with a rubber element 48 embedded in the valve body 22 and a booster output member 50 arranged in front thereof, a mechanical force translation means of the usual kind in brake boosters.
  • a stopper element 52 is latched in such a way that it is connected to the piston for common axial movement.
  • the stopper element 52 extends radially outwards through the recesses 34 and 36 in the valve barrel 30 and valve body 22 respectively and in the illustrated rest position of the piston 42 is in contact with a stopper 53 which is formed on a shoulder of the booster housing 10 and is thus independent of the position of the valve body 22.
  • a flange-like coupling element 54 Spaced away from the rear of the stopper element 52 a flange-like coupling element 54 is formed which in the illustrated rest position of the piston 42 and of the valve barrel 30 is in contact with an annular abutment 55 formed on the valve barrel.
  • the valve spring 38 resulting in this contact, is totally disposed within the valve barrel 30 and tensioned between the second valve seat 32 and the piston 42.
  • annular seal 56 Radially outwards from the abutment 55 an annular seal 56 is disposed, located in an annular recess 57 formed open to the rear end in the piston 42 and which in the illustrated rest position seals off the coupling element 54 of the piston 42.
  • the effective diameter of the seal 56 is, as shown in FIGS. 1 to 3, slightly smaller than the effective diameter of the second valve seat 32.
  • the region downstream of the seal 56 (on the right in the drawing) is continuously exposed to atmospheric pressure. In the illustrated rest position of the valve barrel 30 the seal 56 prevents the atmosphere from gaining access to the rear chamber 12 via the valve barrel 30 and the recesses 34 and 36.
  • the actuator element 44 is normally maintained in its illustrated rest position in which an annular sealing element 60 disposed within the valve body 22 in the usual way and pretensioned forwardly by a spring 62 has sealing contact with the first valve seat 24, whilst not providing a total seal of the second valve seat 32, a slight difference in pressure existing between the two chambers 12 and 14.
  • the front chamber 14 is permanently connected to a vacuum source, as a result of which a vacuum exists in both chambers 12 and 14 in the rest position of the valve barrel 30.
  • the moving wall 16 and the valve body 22 connected thereto in common axial movement thereof are urged into their rear final position, as shown, by a front return spring 64.
  • valve barrel 30 In idle condition the stopper element 52 is in contact with the stop 53, thereby defining the rest position of the piston 42.
  • the valve barrel 30 is supported by the coupling member 54 with practically all of the force exerted by the valve spring 38 clamped between the valve barrel and the piston 42, thereby also defining the rest position of the valve barrel 30, the second valve seat 32 being maintained in contact with the sealing element 60 by a slight residual force of the valve spring 38.
  • the coupling member 54 thereof On forward displacement of the actuator element 44, which for instance is connected to the brake pedal of a vehicle, thus producing forward displacement of the piston 42, the coupling member 54 thereof includes displacement of the abutment 55 and thus of the valve barrel 30 as a whole so that its valve seat 32 is released from the sealing element 60, allowing the downstream flow of atmosphere into the valve body 22 to access the rear chamber 12 through the passage 26 and further through the radial recess 36 in the valve body 22.
  • the front chamber 14 is separated from the rear chamber 12, since the sealing element 60 is maintained firmly in contact with the first valve seat 24, thereby resulting in a difference in pressure between the two chambers 12 and 14 which causes the movable wall 16 together with the valve body 22 and the booster output member 50 to be displaced forwardly.
  • the booster output member 50 transfers the force acting on it to a brake master cylinder 66, the rear end area of which is illustrated in FIG. 1.
  • the solenoid 40 is energized so that it draws the valve barrel 30 away from the coupling element 54 forwards, thereby increasing the clear flow cross-section between the second valve seat 32 and the sealing element 60.
  • a boosted output of the brake booster may for instance be desirable when the vehicle being decelerated is heavily loaded or when particularly fast forward movement of the actuator element 44 indicates that braking action is wanted.on an emergency.
  • the solenoid 40 receives current via a controller with which an acceleration sensor monitoring the actuator element 44 is associated.
  • the power supply of the solenoid 40 may be controlled by a distance sensor which triggers braking action without the driver of the motor vehicle being involved, when the distance away of a vehicle driving ahead violates a specific minimum. In the latter case the control causes, via the solenoid 40, to be moved forward, thus allowing an inflow of atmosphere into the first chamber, even in the absence of a mechanical actuation, i.e. the piston 42 remaining in its rest position.
  • valve barrel 30 On de-energization of the solenoid 40 the valve barrel 30 is again urged rearwards by the valve spring 38 so that the abutment 55 is returned in contact with the coupling element 54 and the seal 56 is again effective.
  • piston 42 On completion of a mechanical force input via the actuator element 44 the piston 42 together with the valve barrel 30 returns to the rest position.
  • the movable wall 16 and the valve body 22 fail to be involved in this return movement as long as a difference in pressure exists between the chambers 12 and 14. This difference in pressure is depleted by the valve barrel 30 urging the sealing element 60 a short distance to the rear so that it unseats from the first valve seat 24.
  • FIG. 4 differs from that illustrated in FIGS. 1 to 3 primarily by the seal 56 being a lip-type seal which is seated in an annular recess 68 of the piston 42 and is radially open outwards, it protrudingly surrounding the coupling element 54 axially forward and sealing off the abutment 55 of the valve barrel 30.
  • the rear component of the valve barrel 30 having the second valve seat 32 is not bolted to the front component of the valve barrel as shown in FIG: 4, but connected by spring latching fingers 70.

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  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Braking Systems And Boosters (AREA)
US08/383,372 1994-02-17 1995-02-03 Pneumatic booster with solenoid auxiliary control, particularly for motor vehicle brake systems Expired - Fee Related US5493946A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4405092A DE4405092C1 (de) 1994-02-17 1994-02-17 Pneumatischer Kraftverstärker mit elektromagnetischer Hilfssteuerung, insbesondere für Kraftfahrzeug-Bremsanlagen
DE4405092.5 1994-02-17

Publications (1)

Publication Number Publication Date
US5493946A true US5493946A (en) 1996-02-27

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ID=6510501

Family Applications (1)

Application Number Title Priority Date Filing Date
US08/383,372 Expired - Fee Related US5493946A (en) 1994-02-17 1995-02-03 Pneumatic booster with solenoid auxiliary control, particularly for motor vehicle brake systems

Country Status (5)

Country Link
US (1) US5493946A (de)
EP (1) EP0668200A3 (de)
JP (1) JPH07251734A (de)
KR (1) KR950031736A (de)
DE (1) DE4405092C1 (de)

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5601008A (en) * 1994-05-25 1997-02-11 Aisin Seiki Kabushiki Kaisha Vacuum servo unit for a vehicle braking system
US5647462A (en) * 1995-03-07 1997-07-15 Aisin Seiki Kabushiki Kaisha Vacuum servo unit for a vehicle braking system
US5697284A (en) * 1994-10-14 1997-12-16 Jidosha Kiki Co., Ltd. Booster
US5937727A (en) * 1996-05-23 1999-08-17 Itt Manufacturing Enterprises Inc. Brake servo device for motor vehicles
FR2782046A1 (fr) * 1998-08-07 2000-02-11 Jidosha Kiki Co Amplificateur de freinage automatique
US6044750A (en) * 1996-10-10 2000-04-04 Lucas Industries Public Limited Company Brake booster with electromagnetic actuation unit
US6048039A (en) * 1995-03-30 2000-04-11 Itt Manufacturing Enterprises Inc. Motor vehicle braking system
US6164183A (en) * 1999-02-10 2000-12-26 Delphi Technologies, Inc. Brake booster with alternate activation by rotary electric motor
WO2001066398A1 (de) * 2000-03-03 2001-09-13 Lucas Varity Gmbh Unterdruckbremskraftverstärker mit verbesserter magnetloser notbremshilfe
USRE37373E1 (en) * 1995-06-22 2001-09-18 Aisin Seiki Kabushiki Kaisha Vacuum servo apparatus
US6311606B1 (en) 1998-09-30 2001-11-06 Aisin Seiki Kabushiki Kaisha Vacuum servo unit for vehicle brake systems
US6321633B1 (en) * 1999-04-30 2001-11-27 Tokico Ltd. Booster
US6505539B2 (en) 1998-08-05 2003-01-14 Lucas Industries Plc Vacuum brake booster with mechanical emergency braking assistance
US6557451B2 (en) 1998-11-02 2003-05-06 Lucas Industries Plc Vacuum brake booster with magnet-free emergency breaking assistance system
US6575077B2 (en) * 2000-05-31 2003-06-10 Aisin Seiki Kabushiki Kaisha Vacuum servo unit
US6705200B2 (en) * 1999-12-15 2004-03-16 Lucas Varity Gmbh Vacuum brake booster with mechanical emergency braking assistance
US20060043788A1 (en) * 2004-08-30 2006-03-02 Peter Schluter Braking force generator for a hydraulic vehicle brake system and vehicle brake system
US20060273659A1 (en) * 2004-02-17 2006-12-07 Lucas Automotive Gmbh Braking force generator for a hydraulic vehicle brake system
US20070001508A1 (en) * 2004-02-02 2007-01-04 Lucas Automotive Gmbh Braking force generator for a hydraulic vehicle braking system
US20080150354A1 (en) * 2006-12-22 2008-06-26 Lucas Automotive Gmbh Brake force generator for a vehicle hydraulic brake system and vehicle hydraulic brake system equipped therewith
US20090115244A1 (en) * 2005-06-29 2009-05-07 Peter Schluter Brake Power Generator For A Hydraulic Vehicle Braking System
CN100528651C (zh) * 2004-02-02 2009-08-19 卢卡斯汽车股份有限公司 用于车辆的液压制动系统和用于该系统的制动力发生器
US20120272820A1 (en) * 2010-01-26 2012-11-01 Kelsey-Hayes Company Input and Output Rods for Vacuum Brake Booster

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DE19514381A1 (de) * 1995-04-19 1996-10-24 Teves Gmbh Alfred Unterdruckbremskraftverstärker
DE19518716A1 (de) * 1995-05-24 1996-11-28 Teves Gmbh Alfred Bremskraftverstärker für Kraftfahrzeuge
DE19519699A1 (de) * 1995-05-30 1996-12-05 Teves Gmbh Alfred Unterdruckbremskraftverstärker
DE19521405A1 (de) * 1995-06-13 1996-12-19 Lucas Ind Plc Bremskraftverstärker/Hauptzylinder-Einheit sowie damit ausgestattete, hydraulische Fahrzeugbremsanlage
DE19655118B4 (de) * 1995-06-22 2006-09-28 Aisin Seiki K.K., Kariya Unterdruckservogerät
DE19529387A1 (de) * 1995-08-10 1997-02-13 Teves Gmbh Alfred Verfahren zum Betrieb eines pneumatischen Bremskraftverstärkers
DE19541101A1 (de) * 1995-11-06 1997-05-07 Teves Gmbh Alfred Verfahren zum Betrieb eines pneumatischen Bremskraftverstärkers
DE19541535A1 (de) * 1995-11-08 1997-05-15 Teves Gmbh Alfred Verfahren zum Betrieb eines pneumatischen Bremskraftverstärkers
JPH1044971A (ja) * 1996-08-02 1998-02-17 Aisin Seiki Co Ltd 負圧式倍力装置
DE19640683A1 (de) * 1996-10-02 1998-04-09 Teves Gmbh Alfred Unterdruckbremskraftverstärker
DE19743843A1 (de) * 1997-10-04 1999-04-08 Itt Mfg Enterprises Inc Pneumatischer Bremskraftverstärker für Kraftfahrzeuge
EP1077851B1 (de) * 1998-05-15 2003-04-16 Continental Teves AG & Co. oHG Bremskraftverstärker mit panikbremsfunktion
DE19960576C1 (de) * 1999-12-15 2001-05-17 Lucas Varity Gmbh Unterdruckbremskraftverstärker mit mechanischer Notbremshilfe
DE102004012260B3 (de) * 2004-03-12 2005-09-08 Lucas Automotive Gmbh Bremskrafterzeuger für eine hydraulische Fahrzeugbremsanlage und Fahrzeugbremsanlage
DE102004038371A1 (de) * 2004-08-06 2006-03-16 Lucas Automotive Gmbh Bremsdruckerzeuger für eine hydraulische Fahrzeugbremsanlage
DE102004041164B4 (de) * 2004-08-25 2010-01-28 Lucas Automotive Gmbh Bremskrafterzeuger für eine hydraulische Fahrzeugbremsanlage, Fahrzeugbremsanlage und Verfahren zum Steuern eines Bremskraftverstärkers

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JPH04113966A (ja) * 1990-09-04 1992-04-15 Jidosha Kiki Co Ltd ブレーキ倍力装置の弁機構
DE4211849A1 (de) * 1992-04-08 1993-10-14 Lucas Ind Plc Pneumatischer Bremskraftverstärker mit elektromagnetischer Hilfssteuerung, insbesondere für Kraftfahrzeuge

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JPH04113966A (ja) * 1990-09-04 1992-04-15 Jidosha Kiki Co Ltd ブレーキ倍力装置の弁機構
EP0478396A1 (de) * 1990-09-28 1992-04-01 Alliedsignal Europe Services Techniques Unterdruckservomotor
US5172964A (en) * 1990-09-28 1992-12-22 Bendix Europe Services Techniques Vacuum booster with electromagnetic valve control
DE4211849A1 (de) * 1992-04-08 1993-10-14 Lucas Ind Plc Pneumatischer Bremskraftverstärker mit elektromagnetischer Hilfssteuerung, insbesondere für Kraftfahrzeuge

Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5601008A (en) * 1994-05-25 1997-02-11 Aisin Seiki Kabushiki Kaisha Vacuum servo unit for a vehicle braking system
US5697284A (en) * 1994-10-14 1997-12-16 Jidosha Kiki Co., Ltd. Booster
US5647462A (en) * 1995-03-07 1997-07-15 Aisin Seiki Kabushiki Kaisha Vacuum servo unit for a vehicle braking system
US6048039A (en) * 1995-03-30 2000-04-11 Itt Manufacturing Enterprises Inc. Motor vehicle braking system
USRE37373E1 (en) * 1995-06-22 2001-09-18 Aisin Seiki Kabushiki Kaisha Vacuum servo apparatus
US5937727A (en) * 1996-05-23 1999-08-17 Itt Manufacturing Enterprises Inc. Brake servo device for motor vehicles
US6044750A (en) * 1996-10-10 2000-04-04 Lucas Industries Public Limited Company Brake booster with electromagnetic actuation unit
US6505539B2 (en) 1998-08-05 2003-01-14 Lucas Industries Plc Vacuum brake booster with mechanical emergency braking assistance
FR2782046A1 (fr) * 1998-08-07 2000-02-11 Jidosha Kiki Co Amplificateur de freinage automatique
US6311606B1 (en) 1998-09-30 2001-11-06 Aisin Seiki Kabushiki Kaisha Vacuum servo unit for vehicle brake systems
DE19946696B4 (de) * 1998-09-30 2006-06-29 Aisin Seiki K.K., Kariya Elektronisch steuerbarer Bremskraftverstärker für Fahrzeugbremssysteme
US6557451B2 (en) 1998-11-02 2003-05-06 Lucas Industries Plc Vacuum brake booster with magnet-free emergency breaking assistance system
US6164183A (en) * 1999-02-10 2000-12-26 Delphi Technologies, Inc. Brake booster with alternate activation by rotary electric motor
US6321633B1 (en) * 1999-04-30 2001-11-27 Tokico Ltd. Booster
US6705200B2 (en) * 1999-12-15 2004-03-16 Lucas Varity Gmbh Vacuum brake booster with mechanical emergency braking assistance
WO2001066398A1 (de) * 2000-03-03 2001-09-13 Lucas Varity Gmbh Unterdruckbremskraftverstärker mit verbesserter magnetloser notbremshilfe
US6711983B2 (en) 2000-03-03 2004-03-30 Lucas Varity Gmbh Vacuum brake booster with improved magnet-free emergency brake assistance system
US6575077B2 (en) * 2000-05-31 2003-06-10 Aisin Seiki Kabushiki Kaisha Vacuum servo unit
US20070001508A1 (en) * 2004-02-02 2007-01-04 Lucas Automotive Gmbh Braking force generator for a hydraulic vehicle braking system
US7347510B2 (en) 2004-02-02 2008-03-25 Lucas Automotive Gmbh Braking force generator for a hydraulic vehicle braking system
CN100528651C (zh) * 2004-02-02 2009-08-19 卢卡斯汽车股份有限公司 用于车辆的液压制动系统和用于该系统的制动力发生器
US20060273659A1 (en) * 2004-02-17 2006-12-07 Lucas Automotive Gmbh Braking force generator for a hydraulic vehicle brake system
US7357466B2 (en) 2004-02-17 2008-04-15 Lucas Automotive Gmbh Braking force generator for a hydraulic vehicle brake system
US20060043788A1 (en) * 2004-08-30 2006-03-02 Peter Schluter Braking force generator for a hydraulic vehicle brake system and vehicle brake system
US20090115244A1 (en) * 2005-06-29 2009-05-07 Peter Schluter Brake Power Generator For A Hydraulic Vehicle Braking System
US20080150354A1 (en) * 2006-12-22 2008-06-26 Lucas Automotive Gmbh Brake force generator for a vehicle hydraulic brake system and vehicle hydraulic brake system equipped therewith
US20120272820A1 (en) * 2010-01-26 2012-11-01 Kelsey-Hayes Company Input and Output Rods for Vacuum Brake Booster
US9168904B2 (en) * 2010-01-26 2015-10-27 Kelsey-Hayes Company Input and output rods for vacuum brake booster

Also Published As

Publication number Publication date
JPH07251734A (ja) 1995-10-03
EP0668200A3 (de) 1996-05-08
KR950031736A (ko) 1995-12-20
DE4405092C1 (de) 1994-12-22
EP0668200A2 (de) 1995-08-23

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